Inclinable boom and bucket for concrete mixers



June 8, 1943.- J, D, FARRELL 2,321,073

INCLINABLE BOOM AND BUCKET FO R CONCRETE MIXERS Filed May 22, 1942Sheets-Sheet 1 INVENTOR ATTORNEY S 3 Sheets-Sheet 2 INVEICITOR 86amTTORNEYS WY m w m y iiliiik E: m w MW June 8, 1943. J. D. FARRELLINCLINABLE BOOM AND BUCKET FOR CONCRETE MIXERS Filed May 22, 1942 June8; 1943. J. D. FARRELL 2,321,073

INCLINABLE BOOM AND UCKET FOR CONCRETE MIXERS Filed May 22, 1942- 3Sheets- Sheet 3 INVENTOR 33 66 63 m6 6! ZTTQRNEYW Patented June 8, 1943UNITED STATES PATENT OFFICE INCLINABLE BOOM AND BUCKET FOR CONCRETEMIXERS tion of Delaware Application'May 22, 1942 Serial No. 444,151

15 Claims.

'This invention relates to an inclinable boom and bucket for a concretemixer, particularly for a concrete mixer of the road paver type, thepurpose of such an inclinable boom being to permit of delivering theconcrete at various heights as in irregular roadwork or in the fillingof elevated forms or hoppers.

In road pavers having a .boom forming a track for the bucket whichdistributes the concrete, it is desirable to positively maintain thebucket in a level position in traveling along the boom so as to avoidthe danger of having the concrete slop out .of the bucket during itstravel along the boom. Wherean inclinable boom is provided so that theconcrete can be delivered to different elevations, as in the filling offorms, or an elevated receiving hopper, it is necessary to provide meansfor adjusting the bucket to a level position at the selected inclinationof the boom.

It is the principal object of the invention to provide, in such aninclinable boom and bucket for a concrete mixer, a simple and reliablemeans for adjusting the bucket relative to its carriage which traversesthe boom so that the bucket can be easily set to a level position at anyselected inclination of the boom.

It is another object of the present invention to provide an auxiliarysupport for the bucket which holds the bucket in proper position whilethe adjustment is being made, thereby to facilit-- tate this adjustment.

Another object is to provide a bucket for such assembly having doors inits bottom which are positively opened and closed by trip and restoringmembers mounted on the outer end of the boom and adjustable lengthwiseof the boom and toward and from one another so that the doors arepositively closed. immediately followin the discharge of the concrete atthe desired elevated place and so that the place of such discharge aswell as the duration of such discharge can readily be regulated.

Another object of the invention is to provide an adjustment in thebucket door opening and closing mechanism which is adjusted tocorrespond to the selected inclination of the boom to insure the properopening and closing of the doors and avoid dribbling of concrete fromthe bucket as it moves along the boom from its receiving to itsdischarging position and vice versa.

Another object of the invention is to provide such an inclinable boomand bucket assembly in which the adjustment of the position of thebucket and the corresponding adjustment-of its dooropening and closingmechanism is effected without danger of relative misadjustment.

Another object is to provide a bucket door opening and closing mechanismwhich operates posi tively and freely to open and close the doors uponstriking the corresponding abutments provided on the boom.

Another object of the invention is to provide such an adjustableinclinable boom and bucket assembly which is simple and rugged inconstruction and will stand up under conditions of severe and constantuse without getting out'of order or requiring repairs.

Another object is to so arrange the sheaves for the bucket cable thatthe same assist in supporting the boom and also embodies the minimumresistance to the movement of the bucket along the boom when inclined,itrequiring, of course, a greater power to elevate the bucket than isrequired to move it along a horizontal boom.

In the accompanying drawings:

Fig. 1 is a side elevation of a concrete road payer having .aninclinable boom and bucket embodying the present invention and showingthe boom inclined to a high angle.

Fig. 2 is an enlarged fragmentary side elevation of the boom and bucketas shown in Fig. 1 and showing the construction of the bucket in greaterdetail.

Fig. 3 is a fragmentary section, through the boom and bucket, taken online 33,Fig. 1.

Fig. 4 is a fragmentary vertical section, taken on line 44, Fig. 3.

Fig, 5 is a view similar to Fig. 4 illustrating the manner in which thedoors at the bottom of the bucket are tripped during the outwardmovement of the bucket along the boom.

Fig. 6 is a view similar to Figs. 4 and 5 illustrating the manner inwhich the doors at the bottom of the bucket are closed following thedischarge -of concrete from the bucket.

Fig. '7 is a view similar to Fig. 4. showing the boom inclined at alesser elevation than that 11+ ustrated in Fig. 4 and showing thecorresponding adjustments made in the bucket mechanism.

Fig. 8 is a view simiar to Figs. 4 and 7 but showing the boomhorizontally disposed and with a corresponding adjustment made in thebucket mechanism.

The boom and bucket assembly forming the subject of the presentinvention is illustrated as mounted on a conventional concrete mixer ofthe road paver type, having a frame 9 carried by crawlers Ill and havinga skip H which can be elevated to discharge the aggregate and Portlandcement into a mixing drum, the discharge of which is indicated at l2.The skip, mixing drum and crawlers are driven by a motor (not shown)which also is employed to raise and lower the inclinable boom and tomove the bucket along the boom to its dischargin position. The toplongitudinalframe members l3 of the frame 9 are shown as extended beyondthe discharge l2 of the mixing drum and as supporting, through avertical pivot 14, a depending saddle l5, this saddle being shown ascarrying, at its lower end, a horizontal pivot [6 which carries one endof the boom l8. The .boom and the frame of the paver are provided withthe usual sheaves for a cable' I! leading to a power drum on the paverfor elevating and lowering the boom. The provision of the vertical pivotI4 at one end of the saddle l5 and the horizontal pivot l6 at the otherend of this saddle provides a universal connection between the boom andthe paver frame, thus permitting the boom to be swung sidewise as wellas to be moved from a horizontalv to different elevated positions, thelateral movement of the boom being particularly necessary in pavingroads where the concrete is being distributed in the form of a widestrip,

The boom- I8 is shown as made of two side channels |8a and I81), thesechannels being spaced from each other, as illustrated in Fig. 3, andsuitable cross connecting members (not shown) being provided atintervals to make the boom a unitary structure. Each channel l8a, l8'bof the boom is also preferably provided with an upstanding supportingpost l9 which supports the center of. a rod 28, each end of this rodbeing suitably secured to the corresponding end of the boom in anysuitable manner and this rod thereby serving to brace the other boomagainst the load of the bucket carried thereby.

The flanges of the channels lBa, l8b project outwardly in opposingrelation to one another and the lower flange of the two channels [8a,I8b form the track for a. carriage of the distributing bucket 26. twoside plates 28, each of which is preferably made in the form of acasting and has a pair of ears 29 and 30 projecting upwardly therefrom.The plates 28 are arranged outside of the channels la and I8!) of theboom and each of the ears 29, 30 carries a roller 3| which engages andrides upon the track formed by the lower flange of the correspondingchannel l8a, [8b of the boom. These channels are preferably standardstructural channels and hence the rollers 3| are inclined so as to fitthe inclined face of the lower flanges of these channels.

To the lower part of each of the side plates is riveted a depending sideplate 32 which can be made of sheet metal and is provided with anarcuate edge 33 and with a series of marginal holes 34 conforming tothis arcuate marginal edge 33. These side plates 32 are connected by afront cross plate 35, the lower portion 36 of which iscurved to conformand fit against the arcuate edges 33 of the sheet metal plates 32. Thecross plate 35, including its lower portion 36, can be welded to theside plates 32 to form a boxlike structure at the front end of thecarriage and inaddition the sides of the carriage are preferably bracedby a bar 38 riveted to the center of the front plate as at 39 and bentto provide legs 40 extending diagonally rearward from the rivet 39 andeach leg joined to the side plates 28 and 32 by a rivet 4|, as bestillustrated in Fig. 4.

The carriage 25 is composed of As best shown in Fig. 4, the rivet 39 forthe braces 46 also secures to the carriage 25 an L- shaped bracket 43which projects forwardly from the carriage and is formed to provide aneye 44 in which the corresponding end of the bucket cable 45 is secured.As shown in Fig. 2, this cable passes around a sheave 46 at the extremeend of the boom and thence under a guide sheave 41 mounted on theupstanding supporting posts IS. The bucket cable 45 also passes under aguide sheave 48 carried at the upper ends of posts 49 secured to andrising from the channels of the boom I 8. The post 49 is preferablylocated approximately two-thirds of the distance from the horizontalpivot IE to the post [9 supporting the the front edges of the sideplates '55. The end of. the bucket 26 adjacent the concrete mixer is extended so that in the lowered position of the bucket, indicated bydotted lines in Fig. 1, the,

bottom plate 56 is arranged under the discharge [2 from the concretemixer so that the charge of concrete contained in the drum of theconcrete mixer is discharged into the bucket when in this loweredposition. To the side and front plate's.' 55, 60 of the bucket is weldeda top plate 6|, the sides of which incline inwardly and upwardly asindicated in Figs. 3 and 4 and terminate in av throat 62 composed of afront flange 64 and side flanges 63, the rear side of the top plate 6|being left open to permit ready access to the bucket for filling orcleaning the same. To this throat 62 is bolted the lower rim of arectangular collar 65, this collar having side walls 66 which straddleand are arranged against the depending arcuate side plates 32, a frontWall 6! the upper edge of. which is arranged close to the curvingportion 36 of the front plate of the carriage and a rear wall 68 whichis extended inwardly at its upper end to brace the collar. Each of theside walls 66 of the collar is provided with an arcuate series of holeswhich coincide in arrangement and spacing to the series of holes 34provided in the depending arcuate side plates 32 of the carriage so thatthe side walls 66 of the collar 65 can be connected to these side plates32 of the carriage by bolts 10, three of such bolts being shown. Sincethe bolt holes in these sidewalls 66 conform in spacing and arrangementto the holes 34 of the side plates 32, it will be seen that the bucketcan be bolted through diflerent groups of the holes 34 in the sideplates 32 and hence that the bucket can be swung into different angularrelations to the carriage 25 about the axis ofthe arcuate lower edges 33of the side plates 32 and the series of holes 34.

The side plates 28, 28 carry a cross shaft 15. this cross shaft beingjournaled in bearings provided in these side plates 28 and the axis ofthese bearings and the cross shaft being concentric with the arcuateedge 33 of the side plates 32 and also with the arcuate series of holes34 provided along this edge. This cross shaft 15 extends beyond thesides of the bucket 26 and to support each end a standard 16 is mountedon the corresponding side of the top plate 6| and is provided with abearing at its upper end in which the shaft is journaled. Thesestandards are for the purpose of supporting the extremities of the.

shaft 15 through the medium of the straps 11, thereby to prevent thebucket from falling in effecting the leveling of the bucket.

To each extremity of the cross shaft 15 is secured'a crank arm 89 andadjacent each of. the

crank arms 89 a segmental plate 8! is loosely mounted on the cross shaft15, this segmental plate having a series of openings 82 whichareconcentric with the axis of the cross shaft liand are also arranged toregister with an opening in the crank arm 89 so that the crank arm canbe connected by a bolt 83 with the segmental plate 8| through any one'ofthe openings 82. To the upper outer extremity of the segmentalplateBl ispivoted, as indicated at 85, the upper end of a link 85, this link beingbent so that when the partsare in the position shown, the link bearsagainst the side of the cross shaft 15. .The lower end of each'link 86,as shown in Fig'. 1, has a spring connection with a rod 81 which in turnis pivotally connected to the'inner ends of a pair of toggle links 89,the outer ends of these toggle links connecting with an arm 89 securedto and projecting upwardly from each door 59, each of these arms 89being in turn pivoted to the corresponding sideplate 55 of the bucket 26at'90.

'With such toggle linkagemechanisms at each side of the bucket connectedto the cross shaft 1.5 through the medium of the link 96', segmentalplate 81 and'crank arm i as shown','it"will be seen that when the crossshaft '75 is rotated clockwise from the positions as viewed in Figs. 2,'7 and 8, the pivot pin 85 at the upper end' of the ling 86 passes tothe right beyond'the deadcenter line of the cross shaft i5 and hencepermits the link 86 to drop. This contracts the toggle links a- 83,thereby to swing the upper ends of the arms 89 inwardly about the pivots9i! and since'thesearms are fast to the doors 59 closing the bottom ofthe bucket, these doors are swung outwardly into an open position so asto permit the contents of the if.

bucket to be discharged. Conversely, when the cross shaft 75 is rotatedcounterclockwise, as viewed in Figs. 2, '7 and 8, back to the positionshown in these figures, each of the pivot pins 85 passes to the left ofthe dead center line of the cross shaft 15 and its link 86 engages thecorresponding side of the cross shaft 15. In so rotating, the link 35 israised thereby to lift and expand the toggle links 88 and force thedoors 59 to swing about the pivots 9:] to the closed position shown. Theengagement of each link 86 with the cross shaft l5 serves to lock thedoors in this closed position.

For the purpose of automatically opening the doors 59 of the bucket atany desired position on the boom 8, a trip mechanism is provided whichrotates the cross shaft 15 in a clockwise direction as viewed in'thedrawings, this trip mechanism being preferably constructed as'follows:

A trip arm 92 is fast to the cross shaft 15 and extendsinto thespacebetween the two channels I811; and labor theboom. IBmThis triparmisarranged adjacent the channel liiaand in the outward .movement ofv thebucket. carriageZS along the boom engages a trip roller 93 mounted on aplate 94 which'is in turn .removably secured to the inner face of thechannel, l,8a, thr0ugh bolt holes 95. Thesev bolt holes, as bestshown inFig. 1, are .provided in a series. along the channel I80. so that theplate 94 and its rollercan be moved to. different positions along. theboom thereby to determine the position of the bucket along the boom atwhich its doors 59 are opened. It will be seenv that when. the trip arm92 engages the trip roller 93, the continued outward movement of thebucket carriage 25 causes. this trip. arm toswing clockwise, thereby toimpart a clockwise rotation tothe cross shaft and carry the pivot. pin85 to the right ofthe dead center line of the cross shaft 15, as viewedin.Figs.=2, 7 andTB and permitthe doors 59 to open, aspreviouslydescribed.

During thelinitiaLpartof the return movem'ent of the bucket carriage valongv the boom l8, the doors 59 are restored to their closed positionso as to avoid the dribbling of concrete from thebucket'during'such.return movement and to permit of "immediatelyrefilling the bucket on reaching the dotted line position shown inFig. 1. For this purpose a door closing arm 96isfast to the cross shaft15 and projects upwardly into the space between the channels Illa andlBb of the boom Hi. This door closing arnr96 is arranged adjacent thechannel 18b" and at its upper end is provided with'a roller 9'? which isadapted to engagethe L-shaped projection v98 of a plate 99 secured tothe inner side of the channel lBb by bolts 190. These bolts I09 aresecured through any pair of two series of bolt holes IN, the series ofbolt holes Hill ektending lengthwise of theib com so that the plate 99can be secured in any desired position along the boom and effect acorresponding adjustment of the place atwhich the doors 59 ofthe bucket26 are closed.

--It will be seen that when the triparm 92 engages the trip roller 93 toopen the bucket doors, the door closingarm 96 is swung toan uprightposition and in position to engage the L-shaped projectioniili' of theplate 99. When its roller 91 so engages this plate during the returnmovement of the bucket carriage 25, the arm 96 is swung counterclockwiseuntil its roller passes underthe L-shapedprojection 98. Thiscounterclockwise movement of the door closing arm effec'tsacorresponding movement of the cross shaft 15, thereby to swing the pivotpin upwardly and to the left of the dead center line of the shaft 15. asviewed in Figs. 2,7 and 8. A corresponding upward movement of the linkscauses the doors 59 tobe drawn to a closed position and this link isbrought into locking engagement with the cross shaft 15 so as to holdthe doors 59 closed until they are again released by .the trip arm92." Y

Assuming that the boom has been elevated through the cable I 'i to thehigh elevation illustrated in Figs 1-6 and with the parts of the bucketand its carriage adjusted as shown,.when the operator draws in thebucket cable 45 the filled bucket is moved from the dotted line positionillustrated in Fig. 1 toward the upper end of the boom, the rollers '31of the carriage riding along the lower flanges of the two channels I and18b which form the boom. The'outward and upward movement of the bucketcontinues until the trip arm 92 strikes the roller 93 on the boomchannel |8a as illustrated in Fig. 5. This engagement swings the triparm from the position shown in Fig. 4 to the position shown in Fig. andhence rotates the shaft clockwise as viewed in these figures. Theclockwise rotation of this shaft causes a corresponding rotation of eachof its crank arms 80 and the segmental plates 8| and moves each pivot 85to the right of the dead center line of the shaft 15, as viewed in Fig.2. When each of these pivots 85 passes beyond this dead center line thelinks 86 drop thereby to draw in the toggle links 88 and the upper endsof the arms 89, as viewed in Fig. 1. Since the arms 89 are pivoted at98, this movement of these arms swings the doors 59 downwardly andoutwardly so as to open them and permit the concrete to flow out of thebucket.

After the bucket has been so emptied the operator pays out the bucketcable so as to permit the bucket to slide down the inclined boom.

The clockwise rotation-of the shaft on being tripped, as abovedescribed, swings the cable closing arm 96 on this shaft to the positionshown in Fig. 6. Hence when the operator pays out the cable 45 to returnthe bucket to the dotted line filling position shown in Fig. 1, theroller 91 of this arm is in position to engage the L-shaped extension 98of the plate 99 on the channel |8b. When this engagement takes place,the movement of the door closing arm 96 is arrested and hence this arm,together with the cross shaft 15, is rotated in a counterclockwisedirection, as viewed in Fig. 6, until the roller 91 passes under theL-shaped extension 98. This counterclockwise rotation swings the crankarms 80 and the segmental plates 8| attached thereto in a similardirection until the pivots 85 pass to the left of the dead center lineof the shaft 15, as viewed in Fig. 2, so that the link 86 is broughtinto engagement with the shaft 15. This counterclockwise movement of thepivots 85 raises the link 86 so as to close the bucket doors 59 throughthe toggle links 88. The bucket therefore continues in its downwardmovement with its doors closed so that very little concrete will dribblefrom the bucket while it is returning to the dotted line fillingposition illustrated in Fig. 1.

The plate 94 carrying the bucket trip roller 93 1 can be adjusted alongthe outer end of the boom through the medium of the series of bolt holes95 and similarly the plate 99 carrying the L-shaped cam extension 98 canbe adjusted along the boom through the medium of a series of bolt holesI0 I. The bucket can therefore be made to open at any desired pointalong the end of the boom and can also similarly be made to close at anyde sired point at the end of the boom and the interval between theopening and closing can similarly be adjusted.

Assuming that it is desired to adjust the boom to the lower inclinationillustrated in Fig. '7, it

the ends of the shaft 15 and would bend the shaft if they were so used.

The operator then swings the bucket 26 to a leveled position andreinserts the bolts 10 through the registering bolt holes of the arcuateplates 32 and the collar 65 of the bucket. Upon tightening these bolts18 the bucket will move along the boom in a level position at the newlyselected inclination of the boom. At the same time it will be seen thatthe swinging of the bucket 26 about the shaft 15 to the newly selectedposition disturbs the door trip and closing mechanism. Thus, swingingthe bucket clockwise, as assumed, effects a similar clockwise movementof the arcuate plate 8|, crank arm and shaft 15. This clockwise movementof the shaft 15 causes a corresponding upward movement of the doorclosing arm 96 and downward movement of the trip arm 92, as viewed inFig. 4. Therefore, with a sufficient readjustment of the level of thebucket, the trip arm would be moved to a position where it would notengage the roller 93 sufficiently to open the bucket doors and similarlythe door closing arm would be moved to a position where, upon engagingthe L-shaped extension 98, it would attempt to rotate the shaft 15counterclockwise beyond that permitted by the engagement of the links 86with this cross shaft. To restore the door opening and closing mechanismto an operative condition after the bucket has been leveled, theoperator removes the bolt 83 and selects one of the other bolt holes 82so that in the newly selected inclination of the bucket the trip 92 anddoor closing arm 96 are restored to the position shown in Fig. 4 withreference to the roller 93 and L-shaped cam 98, respectively. As shownin Fig. 2, in the maximum inclined position of the boom I8 the bolt 83oocupies the uppermost hole 82 of the segmental plate 8|. In thehorizontal position of the boom |8, as shown in Fig. 8, this boltoccupies the lowermost hole 82 of the segmental plate 8| and in anintermediate position, as illustrated in Fig. '7, the bolt 83 occupiesan intermediate hole 82 of the segmental plate 8|.

From the foregoing it will be seen that the inclinable boom and bucketassembly forming the subject of the present invention provides a verysimple means for leveling the bucket relative to its carriage as theboom is moved to different properly in the readjusted relation betweenthe bucket of this carriage by the simple expedient of adjusting thebolts 83 along the holes 82, these holes being, of course, selected tocorrespond to the arcuate series of holes in the arcuate plates 32. Theprovision of the adjustment holes 95 and it'll along the boom for thetrip roller 93 and door closing cam 98 further permits of adjusting thedischarge and closing of the bucket at any place along the outer end ofthe boom and extending the boom cable directly from the mixer frame tothe sheaves 4'! and 48 near the center of the boom serves not only toavoid a sharp bend in the cable with attendant power loss, but alsoserves to in part support the weight of the boom by the bucket cable,particularly when the heavy load of concrete in the bucket is beingelevated to the outer end of the boom.

I claim as my invention:

1. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to diflerentinclinations and being formed .to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and having adepending arcuate member extending lengthwise of said boom, said arcuatemember beingconcentric with a horizontal axis extending centrallythrough said carriage and transversely of said boom, a bucket adapted toreceive the material to be distributed from said paver, means forpivotally supporting said bucket on said carriage concentric with saidaxis, and means for securing said bucket to said arcuate member atdifferent positions along the arc thereof thereby permitting said bucketto be leveled upon moving said boom to difierent inclinations.

2. An inclinable boom and bucket assembly for -concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and having adepending member extending lengthwise of said boom, said dependingmember being formed to provide an arcuate series of transverse holeshaving a common axis extending horizontally and transversely of saidboom, a bucket adapted to receive the material to be distributed fromsaid paver and provided With holes adapted to register with selectedholes of said arcuate series of holes, means for pivotally supportingsaid bucket on said carriage concentric with said axis, and removablefastening members adapted to be inserted in the holes of said dependingmember and bucket to fix said bucket in a level position with differentinclinations of said boom.

3. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and having adepending member extending lengthwise of said boom, said dependingmember being formed to provide an arcuate series of transverse holeshaving a common axis extending horizontally and transversely of saidboom and said common axis extending through said carriage, a bucketadapted to receive the material to be distributed from said paver andprovided with holes adapted to register with selected holes of saidarcuate series of holes, means for pivotally supporting said bucket onsaid carriage concentric with said axis, and removable fastening membersadapted to be inserted in the holes of said depending member and bucketto fix said bucket in a level position with different inclinations ofsaid boom.

4. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to diiferentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and 1 having apair of spaceddepending, vertical side plates extending lengthwise ofsaid-boom,=-each of said side plates being formed to provide an arcuateseries of transverse hole and the series of holes of the two plateshaving a common axis extending horizontally and transversely of saidboom, a bucket adapted to receive the material 'to be distributed fromsaid paver and having vertical side walls the upper parts of which fitagainst said side'plates and-are provided with "holes adapted toregister with selected holes of said arcuate series of holes, means forpivotally supporting said bucket on said carriage concentric with saidaxis, and removable fastening members adapted to beinserted in theholesof said bucket walls and said side plates to fix said bucket in alevelpositio withdifferent inclinations of said boom.

5. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and havinga pairof spaced, depending, vertical side plates extending lengthwise of saidboom, each of said side plates being formed to provide an arcuate seriesof transverse holes and the series of holes of the two .plates' having acommon axis extending horizontally and transversely of said boom, abucket adapted to receive the material to be distributed from said paverand having a top provided with a contracted upwardly extending neck,means for pivotally supporting said bucket on said Carriage concentricwith said axis, a collar secured to said neck and having vertical sideWalls which fit against said' side plates and are provided with holesadapted to register with selected holes ofsaid arcuate series of holes,and removable fastenin members adapted to be inserted in the holes ofsaid side walls and said side plates to fix said bucket in a levelposition with different inclinations of said boom.

6. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to diiferentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and having adepending member extending lengthwise of said boo-m, said dependingmember being formed to provide an arcuate series of transverse holeshaving a common axis extending horizontally and transversely of saidboom and said common axis extending through said carriage, a bucketadapted to receive the material to be distributed from said paver andprovided with holes adapted to register with selected holes of saidarcuate series of holes, means for pivotally supporting said bucket onsaid carriage concentric with said axis, removable fastening membersadapted to be inserted in the holes of said depending member and bucketto fix said bucket in a level position with different inclinations ofsaid boom and means pivotally secured to said carriage substantiallycoaxial with said common axis and connected with said bucket to supportsaid bucket when said fastening members are removed from said holes.

7. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally se curedto said paver to permit it to be raised and lowered-to different Iinclinations and- "being formed to provide a track extending lengthwisethereof, a, carriage having rollers riding on said track and carrying acentrally disposed, horizontal cross shaft extending transversely ofsaid boom, a bucket adapted to receive the material to be distributedfrom said paver, a hanger having its upper end carried by said crossshaft and rotatable about the axis of said cross shaft and secured tosaid bucket at its lower end and means for securing said bucket to saidcarriage at different radial positions relative to the axis of saidcross shaft thereby permitting said bucket to be leveled upon movingsaid boom to different inclinations.

8. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and havingspaced, depending, vertical side walls extending lengthwise of saidboom, a horizontal cross shaft mounted centrally in said side walls toextend transversely of said boom, each of said side walls being formedto provide an arcuate series of transverse holes and the series of holesof the two side walls having a common axis substantially coincident withthe axis of said cross shaft, a bucket adapted to receive the materialto be distributed from said paver and having vertical side walls theupper parts of which fit against said side walls of said carriage andare provided with holes adapted to register with selected holes of saidarcuate series of holes, a pair of hangers carried by said cross shaftadjacent the side walls of said carriage and rotatable about the axisthereof and said hangers being secured at their lower ends to saidbucket, and removable fastening members adapted to be inserted in theholes of said walls of said bucket and carriage to fix said bucket in alevel position with different inclinations of said boom.

9. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track, a horizontalcross shaft journaled in said carriage and extending transversely ofsaid boom, a bucket adapted to receive the material to be distributedfrom said paver and having a bottom opening, a door for said opening,means operatively connecting said door and cross shaft for opening saiddoor when said shaft is rotated in one direction, means for securingsaidbucket to said carriage at different radial positions relative to theaxis of said cross shaft thereby permitting said bucket to be leveledupon moving said boom to different inclinations, a trip arm fast to saidcross shaft adjacent said boom, and abutment means on said boom in thepath of said trip arm and engaging said trip arm during the outwardmovement of said carriage from said paver along said boom to turn saidcross shaft in said one direction to open said bucket door.

10. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track, a horizontalcross shaft journaled in said carriage and extending transversely ofsaid boom, a bucket adapted to receive the material to bedistributedfrom said paver and having a bottom opening,-a door for saidopening, means operatively connecting said door and crossshaft foropening said door when said shaft is rotated in one direction, means forsecuring said bucket to said carriage at different radial positionsrelative to the axis of said cross shaft thereby permitting said bucketto be leveled upon moving said boom to different inclinations, a triparm fast to said cross shaft adjacent said boom, abutment means on saidbooth in the path of said trip arm and engaging said trip arm during theoutward movement of said carriage from said paver along said boom toturn said cross shaft in said one direction to open said bucket door,and means for adjustably moving said abutment means lengthwise of saidboom.

11. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track, a horizontalcross shaft journaled in said carriage and extending transversely ofsaid boom, a bucket adapted to receive the material to be distributedfrom said paver and having a bottom opening, a door for said opening,means operatively connecting said door and. cross shaft for closing saiddoor when said shaft is rotated in one direction, means for securingsaid bucket to said carriage at different radial positions relative tothe axis of said cross shaft thereby permitting said bucket to beleveled upon moving said boom to different inclinations, a door closerarm fast to said cross shaft adjacent said boom, and abutment means onsaid boom in the path of said door closer arm and engaging said doorcloser arm during the inward movement of said carriage toward said paveralong said boom to turn said cross shaft in said one direction to closesaid bucket door.

12. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track, a horizontalcross shaft journaled in said carriage and extending transversely ofsaid boom, a bucket adapted to receive the material to be distributedfrom said paver and having a bottom opening, a door for said opening,means operati-vely connecting said door and cross shaft for closing saiddoor when said shaft is rotated in one direction, mean for securing saidbucket to said carriage at different radial positions relative to theaxis of said cross shaft thereby permitting said bucket to be leveledupon moving said boom to different inclinations, a door closer arm fastto said cross shaft adjacent said boom, abutment mean on said boom inthe path of said door closer arm and engaging said door closer armduring the inward movement of said,

carriage toward said paver along said boom to turn said cross shaft insaid one direction to close said bucket door, and means for adjustablymoving said abutment means lengthwise of said boom.

13. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver-to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track, a horizontalcross shaft journaled in said carriage and extending transversely ofsaid boom, a bucket adapted to receive the material to be distributedfrom said paver and having a bottom opening, a door for said opening, adepending link arranged alongside said bucket, means operativelyconnecting the lower end of said link to said door to open and closesaid door in response to the vertical movement of said link, a crank armfast to said cross shaft, a pivot pin connecting the upper end of saidlink to said crank arm, means for securing said bucket at differentradial positions relative to the axis of said cross shaft therebypermitting said bucket to be leveled upon moving said boom to differentinclinations, a second arm fast to said cross shaft adjacent said boom,abutment means on said boom in the path of said second arm and engagingsaid second arm during the movement of said carriage along said boom toturn said cross shaft, and means for adjusting the said pivot pin todifierent radial positions relative to the axis of said cross shaft toobtain proper engagement of said second arm with said abutment in allleveled positions of said bucket.

14. An inclinable boom and bucket assembly 7 for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to difierentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track, a horizontalcross shaft journaled in said carriage and extending transversely ofsaid boom, a bucket adapted to receive the material to be distributedfrom said paver and having a bottom opening, a door for said opening, adepending link arranged alongside said bucket, means operativelyconnecting the lower end of said link to said door to open and closesaid door in response to the vertical movement of said link, a crank armfast to said cross shaft, a pivot pin connecting the upper end of saidlink to said crank arm, means for securing said bucket at differentradial positions relative to the axis of said cross shaft therebypermitting said bucket to be leveled upon moving said boom to differentinclinations, a second arm fast to said cross shaft adjacent said boom,abutment means on said boom in the path of said second arm and engagingsaid second arm during the movement of said carriage along said boom toturn said cross shaft, and means for adjusting the said pivot pin todifferent radial positions relative to the axis of said cross shaft toobtain proper engagement of said second arm with said abutment in allleveled positions of said bucket and comprising a plate loosely mountedon said cross shaft adjacent said crank arm and link and carrying saidpivot pin, said plate being provided with an arcuate series of holesarranged concentric with said cross shaft and a fastening membersecuring said crank arm to said plate through one of said arcuate seriesof holes selected in accordance with the relative position of said boomand bucket.

15. An inclinable boom and bucket assembly for concrete pavers and thelike, comprising a boom having one end adapted to be pivotally securedto said paver to permit it to be raised and lowered to differentinclinations and being formed to provide a track extending lengthwisethereof, a carriage having rollers riding on said track and having apair of spaced, depending, vertical side walls extending lengthwise ofsaid boom, a horizontal cross shaft journaled in said side walls toextend transversely of said boom, each of said side walls being formedto provide an arcuate series of transverse holes and the series of holesof the two side walls having a common axis substantially coincident withthe axis of said cross shaft, a relatively wide bucket adapted toreceive the material to be distributed from said paver and having adischarge opening in its bottom, a door pivotally mounted on said bucketto open and close said opening, said bucket having a top provided with acontracted upwardly extending neck having vertical side walls which fitagainst the side walls of said carriage and are provided with holesadapted to register with selected holes of said arcuate series of holes,removable fastening members adapted to be inserted in the holes of saidside walls of said neck and carriage to fit said bucket in a levelposition with different inclinations of said boom, standards secured tothe top of said bucket and having bearings in which the outer ends ofsaid cross shaft are journaled, a pair of hangers rotatably mounted onsaid cross shaft adjacent the side walls of said carriage and saidhangers being secured at their lower ends to said top of said bucket tosupport said bucket when said fastening members are removed, meansoperatively connecting each end of said cross shaft with thecorresponding end of said door for opening and closing said door uponrotating said cross shaft in opposite directions, and cooperating meanscarried by said boom and cross shaft for rotating said cross shaft in atleast one direction in response to the movement of said carriage alongsaid boom.

JOHN D. FARLRELL.

